Motor.



No- 735,491. PATENTED AUG. 4, 1908. J. W. GARRETT.

MOTOR.

APPLIOATION FILED MAY 21, 1902.

N0 MODEL.

2 SHEETS-SHEET 1. 24

WITNESSES: INVENTOH -j0n/77. arrefi m: Norms PEYERS co PNOTO-LITHO., WASHINGTON. u. c.

No. 735,491. PATENTED AUG. 4, 190 3.

J. W. GARRETT.

MOTOR.

APPLICATION FILED MAY 21, 1902.

N0 MODEL.

2 SHEETSSHEET 2.

WITNESSES: INVENTOH A TTOHNE Y S.

ms norms PETERS co, Pwrruu'm ms g No. 735,491

UNITED STATES.

Patented Au ust 4, 190a.

PATENT FFICE.

MOTOR.

SPECIFICATION forming part of Letters Patent No. 735,491, dated August 4, 1903.

I Application filed May 21, 1902. Serial No. 108,364. (No model.)

To on whom, it may concern: I I

Be it known that I, JOHN 'W. GARRETT, a citizen of the United States, and a resident of the city of New York, borough of Manhattan, in the county and State of New York, have invented a new and Improved Motor, of which the following is a full, clear, and exact description. Y

This invention relates particularly to that class of motors known as gas or explosive motors, an object being to provide a simple and inexpensive means for converting a steam or similar pressure engine .of the ordinary slide-valve type into a gas-motor of high power.

I will describe a motor embodying my invention and then point out the novel features in the appended claims.

Reference is to be had to the accompanying drawings,forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures.

Figure 1 is a sectional elevation of a motor embodying my invention. Fig. 2 is a vertical section showing the parts in a different position from that of Fig. 1, and Fig. 3 is a section on the line 3 3 of Fig. 2.

Referring to the drawings, 5 designates the working cylinder, and 6 the piston operating therein, these parts being of the usual steamengine construction. Atits opposite ends the cylinder has ports- 7 8, and itis also provided with an exhaustport 9.

which a slide-valve 11 operates" This slide- 1 valve is similar to the ordinary slide-valves,

excepting that it is provided with two separated ports 12 13 at itsopposite ends, de-

signed for communicating with the inlet-ports of the cylinder. This slide-valve 11 is operated by an eccentric 14 on the crank-shaft 15, which has the usual connection with the piston. Also operatingin the valve-casing is an auxiliary slide-valve 16, which engages upon the valve 1], and this auxiliary valveis provided at its ends with separated ports 17 and 18, designed for communication with the ports 12 and 13. The object in dividing the ports is to direct two gasesinto the cylinder before the same become mingled.

The slide-valve 16 preferably consists of two sections adjustably connected together.

Arranged on one .side ofthe cylinder is a valve=casing 10, in

As a means for such adjustment I have connected the two sections by means of a screwrod 19, having right and left threads. This valve 16 is operated by an eccentric 20 on the crank-shaft. eccentric 14 is arranged at an angle ofninety degrees to the crank, while the eccentric 20 is arranged at one hundred and eighty degrees from the crank. Therefore there will be a differential motion between the two "valves.

A pipe 21, leading from a gas-supply, has branch portions extending through the wall of the valve-casing and adapted for communication with the ports 17, and a pipe 22,

leading from another gas-tank, has branch connections leading through the cylinder- Wall forcommunication with the ports 18.

An electrode 23 is extended through a head of the cylinder and is in electrical connection therewith, and an electrode 24 extends through said head, but is insulated therefrom. In the opposite head is an electrode 25, in electrical connection with the cylinder, and an electrode 26, insulated therefrom. On the crank-shaft is a disk 27, of insulating material, which has at opposite sides metal plates 28 29. From a brush 30 a wire 31 leads to a connection with the electrode 24. From a brush 32 a wire 33 leads to a connection with the electrode 26, while from a brush 34 a wire 35 leads to electrical connection with the cylinder, and arranged in this wire 1 35 is a battery 36 and a spark-coil'37. When a the brushes 32 and 34 are in contact with the plate 28, the circuit will be. closed through the sparking device com prisingthe electrodes 25 and 26, and when the brushes 30 and 3 1 are in contact with the plate 29 the circuit will be closed for the sparking devices 23 and 24.

In operation under ordinary circumstances the gases are introduced into the cylinder in the usual manner by the action of the piston; but where an engine of high power is desired for special purposes I provide two reservoirs or tanks, which, as before stated, are in connection, respectively, with pipes 21 and 22, the said tanks being capable of holding two or more gases, preferably hydrogen and oxygen or hydrogen and air, at a high or 3131101" mal pressure. The gases arereleased from It may be here stated that the 1 the reservoirs and introduced into the cylinder at any desired pressure by a suitable valve capable of being regulated, and the gases thus entered and combined act by expansion in the cylinder in a manner similar to that of steam. When the piston shall have reached any desired part of its stroke, the gases are inclosed in the cylinder by the shifting of the auxiliary valve, and after acting by expansion to start the piston the gas is exploded by an electric spark in the usual manner, the pressure produced actuating the piston to the limit of its stroke. It can be readily understood that by increasing or reducing the pressure at which the gases are introduced into the cylinder the power and speed of the engine can be easily controlled and operated in exactly the same manner as a steam or similar pressure engine, giving an engine of great horse-power for special purposes, such as torpedoes, submarine boats, automobiles, &c.

I do not provide any air, water, or other cooler, as I find that by using the preferred gases such cooling devices are not necessary,

for the reason that upon the said gases exploding they reunite to form water, which action absorbs a great portion of the heat which under other circumstances would be imparted to the cylinder. The volume of water compared to these gases is inconsiderable. Therefore in the case of hydrogen and oxygen being used a partial vacuum would be produced, which may be taken advantage of by a check-valve in the exhaust. In the case of hydrogen and air this action will matee rially reduce the exhaust, as the hydrogen combines with the oxygen in the air and only the nitrogen, which remains neutral, would be'exhansted, thus reducing the noise so objectionable in explosive-motors. The water formed is deposited on the walls of the cylinder and assists in the lubrication, and therefore very little oil or similar material is required.

The fact that the engine can be started, stopped, and reversed by the action or expansion of the gases dispenses with the heavy fiy-wheel and complicated reversing gear necessary for the usual explosive-engines and in an automobile would do away with the objection of leaving the motor in operation while at a standstill.

Having thus described my invention, I claim as new-and desire to secure by Letters Patent- I 1. A motor comprising a cylinder, a piston operating therein, said cylinder having ports at its opposite ends, a slide-valve for controllingv said ports, the said slide-valve having two separated ports at its opposite ends, an auxiliary valve having two separated ports at its opposite ends, and gas-supply pipes leading from independent sources and adapted for communication with ports of the auxiliary valve, substantially as specified.

2. A motor comprising a cylinder, a piston operating therein, the said cylinder having ports at its opposite ends, a slide-valve for controlling said ports, the said slide valve having two separated ports at its opposite ends, an auxiliary slide-valve having two separated ports atits opposite ends, the said auxiliary valve consisting of two sections adjustable with relation to each other, a casing in which the valves operate, and two independent supply-pipes leading into said casing, substantially as specified.

3. A motor comprising a cylinder, a piston operating therein, said cylinder having ports at its opposite ends, a valve-casing on the cylinder, a slide-valve operating in said casing and having double ports at its opposite ends,

an auxiliary slide-valve in the casing and having double ports at its opposite ends, a gas-supply pipe for communicating with ports at opposite ends of the auxiliary valve, another gas-supply pipe for communicating with the other ports of the auxiliary valve, and

JOHN W. GARRETT.

Witnesses:

JNo. M. BITTER, C. R. FERGUSON. 

